61012499 has 2 divisors, whose sum is σ = 61012500. Its totient is φ = 61012498.

The previous prime is 61012489. The next prime is 61012513. The reversal of 61012499 is 99421016.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61012499 is a prime.

It is not a weakly prime, because it can be changed into another prime (61012459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30506249 + 30506250.

It is an arithmetic number, because the mean of its divisors is an integer number (30506250).

Almost surely, 2^61012499 is an apocalyptic number.

61012499 is a deficient number, since it is larger than the sum of its proper divisors (1).

61012499 is an equidigital number, since it uses as much as digits as its factorization.

61012499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 61012499 is about 7811.0498014031. The cubic root of 61012499 is about 393.6766029649.

The spelling of 61012499 in words is "sixty-one million, twelve thousand, four hundred ninety-nine".